RTMP Client API List

Riot has released an official API at the end of 2013. There is some limitations (trafic and available methods) but to understand how it works : it seems to be the best way to start.
In the other hand, many developers has released unofficial RTMP API without any limitation, in some different languages.

This list shows all known API, if they have a rich documentation or not and if they have an asynchronous system (several simultaneous connections for faster processing).

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Official API

• Riot Games API

Unofficial API

• Java
• LoLRTMPS Client
• LeagueLib
• RiotApi
• PHP
• EloGank - LoL PHP API
• phpLoL
• C#
• LibOfLegends

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Official API

Riot Games API

Release Date	Asynchronous	Documentation	Maintained	Website
December 2013	Yes	Full	Yes	Dedicated website

Followed by many developers, many libraries are available to use this API, see the official forum thread.

Note : it's a RESTful API.

Unofficial API

Java

LoLRTMPS Client

Release Date	Asynchronous	Documentation	Maintained	Website
May 2012	Yes	No	Yes	Google code

This API is the beginning of all unofficial API. This amazing work done by Gabriel Van Eyck helped many developers to create their own API based on his code. It provides a fully asynchronous & multi-threaded system with native Java Thread library.

LeagueLib

Release Date	Asynchronous	Documentation	Maintained	Website
Febuary 2013	Yes	Few	Yes	Github

Built on top of LoLRTMPS Client and used by LoLTeam and LoLTalk projects, it implements more features than LoLRTMPS Client.
This API seems to be followed by many developers.

RiotApi

Release Date	Asynchronous	Documentation	Maintained	Website	License
August 2014	Yes	Here	Yes	Github	Apache 2.0

Heavily inspired by rtmpsharp, the rtmp module is a part of the RiotApi project and offers both async and sync methods. RiotApi is build on top of a full RTMP/AMF serialization module and aims to reduce the use of untyped key-value maps by introducing matching classes wherever possible.

PHP

EloGank - LoL PHP API

Release Date	Asynchronous	Documentation	Maintained	Website
March 2014	Yes	Full	Yes	Github

Built with technologies like ZeroMQ & ReactPHP and used by the EloGank project, this API provides a fully asynchronous and multi-threaded system with many features. A Virtual Machine installation process is available.

phpLoL

Release Date	Asynchronous	Documentation	Maintained	Website
Febuary 2013	No	Examples available	Yes	Github

Basic League of Legends client API in PHP. Fully OOP with SabreAMF custom implementation.

C Sharp

LibOfLegends

Release Date	Asynchronous	Documentation	Maintained	Website
Febuary 2012	N/C	Examples available	No	Github

This is a C# networking library that pretends to be the League of Legends Air client. It was developed for the purpose of stats tracking. It depends on a modified version of the FluorineFX library available in the FluorineFXMods repository. It also depends on NilSharp, a random general purpose library.